Definitions of CONSENSUS on the Web:

A consensual agreement or win-win outcome of collaborative problem-solving and conflict resolution. A consensus implies that debate has taken place, the solution is generally accepted rather than a grudging compromise, and that agreement is deep-rooted enough that it can stand for some time without need to revisit the issue. (See COMPROMISE, COLLABORATION, CONFLICT RESOLUTION, DELPHI METHOD) (MP)
www.biol.tsukuba.ac.jp/~macer/biodict.htm

The point at which agencies and the public offer their agreement with recommendations or findings. Although unanimous consensus is seldom achieved, continuous coordination throughout the study process is expected to garner support from most agencies and much of the public.
www.eastbradybridge.com/about/glossary.asp

General agreement in principle. Does not imply total agreement or unanimous assent.
www.mc2consulting.com/riskdef.htm

A mutually acceptable agreement that takes into consideration the interests of all concerned parties. An agreement reached through consensus may not satisfy each participant’s interests equally or receive a similar level of support from all participants.
www.peoples-law.org/core/mediation/adr_directory/definitions-terms.htm

A method of making decisions through which a group strives to reach substantial, though not necessarily unanimous, agreement on matters of overall direction and policy which can be supported by all.
www.catholicgbg.org/DOGWeb/WSOTFT3.nsf/PageByKey/F26E878AFDA2377185256C3E006324B8.html

A general agreement reached by most everyone.
www.bamaed.ua.edu/cohorts/2000/qualitycourse/GLOSSARY.htm